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Finding the Fourth Proportional to 315.75, 473.39 and 171.27

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Solution

The fourth proportional to 315.75, 473.39 and 171.27 is: 256.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    315.75 : 473.39 = 171.27 : x
  2. Step 2: Convert to fraction form
    315.75/473.39 = 171.27/x
  3. Step 3: Cross multiply
    315.75x = 473.39 × 171.27
  4. Step 4: Simplify right side
    315.75x = 81,076.65
  5. Step 5: Solve for x
    x = 81,076.65/315.75
  6. Step 6: Final answer
    x = 256.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.